Protons are composed of valence quarks, sea quarks, and gluons

the verdict

SUPPORTED

the evidence backs this

Recorded sources

4 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Modern particle physics and high-energy collider data confirm that protons are complex composite particles made up of valence quarks, sea quarks, and gluons.

The analysis

The claim is a standard empirical fact of quantum chromodynamics (QCD) describing proton substructure. Multiple papers in the retrieved set analyze parton distribution functions (PDFs), explicitly detailing valence quarks, sea quarks, and gluons within the proton.

Evidence for · 4

Parton distributions from high-precision collider data: NNPDF Collaboration.

Recorded source metadata

Ball RD, Bertone V, Carrazza S, Debbio LD, Forte S, Groth-Merrild P, Guffanti A, Hartland NP, Kassabov Z, Latorre JI, Nocera ER, Rojo J, Rottoli L, Slade E, Ubiali M. Parton distributions from high-precision collider data: NNPDF Collaboration.. 2017. https://doi.org/10.1140/epjc/s10052-017-5199-5

NNPDF3.1 discusses independent parton distributions for light-quarks, charm, and gluons, reflecting the internal partonic structure of the proton.

Source citation format

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More for · 3

EPPS16: nuclear parton distributions with LHC data.

Recorded source metadata

Eskola KJ, Paakkinen P, Paukkunen H, Salgado CA. EPPS16: nuclear parton distributions with LHC data.. 2017. https://doi.org/10.1140/epjc/s10052-017-4725-9

EPPS16 analyzes nuclear parton distributions and discusses constraints on valence quarks and gluons.

Source citation format

Neutrino-nucleon DIS from holographic QCD: PDFs of sea and valence quarks, form factors, and structure functions of the proton

Recorded source metadata

K. A. Mamo, I. Zahed. Neutrino-nucleon DIS from holographic QCD: PDFs of sea and valence quarks, form factors, and structure functions of the proton. 2021. https://doi.org/10.1103/PhysRevD.104.066010

Holographic QCD approaches extract non-perturbative parton distribution functions carried by sea and valence quarks in the proton.

Source citation format

Twist-3 generalized parton distributions of sea quarks at zero skewness in the light-cone quark model

Recorded source metadata

Xiao Luan, Zhun Lu. Twist-3 generalized parton distributions of sea quarks at zero skewness in the light-cone quark model. 2025

Studies of twist-3 parton distributions investigate the sea quark contributions within the proton.

Source citation format

The paper trail · every fact has a biography

first checked01 Aug 2026

judged → SUPPORTED · 8801 Aug 2026

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